According to the Longmont Police Department, Turner shocked his estranged wife with a stun gun and pepper sprayed her before he kidnapped their son.

Turner was seen riding away with Luke in on a bicycle with a childrens' seat, police said, and had likely parked a vehicle nearby to make his getaway.

An Amber Alert that had been issued for Luke was cancelled this afternoon.

Early this morning, Monty Turner's father was arrested after he was pulled over in Missouri while driving a car being sought in connection with his grandson's disappearance, Longmont police told ABC News' Denver affiliate. Ronald Turner was arrested as an accessory, police said.